Abstract: A system detects an acoustic-wave-producing downhole event associated with a pipe at an uphole location in the presence of surface noise. The system comprises: a first plurality of acoustic sensors located a first axial position along the pipe and oriented symmetrically about the pipe axis; and a second plurality of acoustic sensors located a second axial position along the pipe and oriented symmetrically about the pipe axis, the second axial position spaced apart from the first axial position. A processor is connected to receive the signals from the first and second pluralities of sensors and configured to process the sensor signals to thereby produce an output signal. The processor is configured to adjust the digital processing, based on the sensor signals, to minimize a contribution of the surface noise to the output signal.

Abstract: Methods determine a state of a well and comprise: receiving a set of well operations data comprising at least some measured well operations data; determining the occurrence of a well operations event based on the received data; evaluating one or more possible state transitions from a current well operations state to one or more possible new well operations states, the current state and the possible new states selected from a configurable plurality of well operations states, wherein evaluating the one or more possible state transitions is based on the current state, the determined event and the received data and wherein evaluating the one or more possible state transitions comprises determining a confidence level associated with each of the possible new states; and determining one of the possible new states to be a new predicted well operations state according to whichever possible new state has a highest confidence level.

Abstract: A system detects an acoustic-wave-producing downhole event associated with a pipe at an uphole location in the presence of surface noise. The system comprises: a first plurality of acoustic sensors located a first axial position along the pipe and oriented symmetrically about the pipe axis; and a second plurality of acoustic sensors located a second axial position along the pipe and oriented symmetrically about the pipe axis, the second axial position spaced apart from the first axial position. A processor is connected to receive the signals from the first and second pluralities of sensors and configured to process the sensor signals to thereby produce an output signal. The processor is configured to adjust the digital processing, based on the sensor signals, to minimize a contribution of the surface noise to the output signal.

Abstract: A system detects an acoustic-wave-producing downhole event associated with a pipe at an uphole location in the presence of surface noise. The system comprises: a first plurality of acoustic sensors located a first axial position along the pipe and oriented symmetrically about the pipe axis; and a second plurality of acoustic sensors located a second axial position along the pipe and oriented symmetrically about the pipe axis, the second axial position spaced apart from the first axial position. A processor is connected to receive the signals from the first and second pluralities of sensors and configured to process the sensor signals to thereby produce an output signal. The processor is configured to adjust the digital processing, based on the sensor signals, to minimize a contribution of the surface noise to the output signal.

Abstract: A system detects an acoustic-wave-producing downhole event associated with a pipe at an uphole location in the presence of surface noise. The system comprises: a first plurality of acoustic sensors located a first axial position along the pipe and oriented symmetrically about the pipe axis; and a second plurality of acoustic sensors located a second axial position along the pipe and oriented symmetrically about the pipe axis, the second axial position spaced apart from the first axial position. A processor is connected to receive the signals from the first and second pluralities of sensors and configured to process the sensor signals to thereby produce an output signal. The processor is configured to adjust the digital processing, based on the sensor signals, to minimize a contribution of the surface noise to the output signal.

Abstract: A communication method is provided for a communication system comprising a transmitter and a receiver. The method involves communicating data from the transmitter to the receiver over a banded communication channel. The method comprises: applying a forward error correction, FEC, code to data to be transmitted to obtain FEC-encoded data; assigning the FEC-encoded data into a plurality of sub-channels; modulating the data from each of the plurality of sub-channels into a corresponding one of a plurality of sub-bands, the plurality of sub-bands having spaced apart center frequencies; and concurrently transmitting the data from the plurality of sub-bands onto a banded communication channel, the banded communication channel comprising one or more pass-bands and one or more stop-bands.

Abstract: A communication method is provided for a communication system comprising a transmitter and a receiver. The method involves communicating data from the transmitter to the receiver over a banded communication channel The method comprises: applying a forward error correction, FEC, code to data to be transmitted to obtain FEC-encoded data; assigning the FEC-encoded data into a plurality of sub-channels; modulating the data from each of the plurality of sub-channels into a corresponding one of a plurality of sub-bands, the plurality of sub-bands having spaced apart center frequencies; and concurrently transmitting the data from the plurality of sub-bands onto a banded communication channel, the banded communication channel comprising one or more pass-bands and one or more stop-bands.

Abstract: A communication method is provided for a communication system comprising a transmitter and a receiver. The method involves communicating data from the transmitter to the receiver over a banded communication channel. The method comprises: applying a forward error correction, FEC, code to data to be transmitted to obtain FEC-encoded data; assigning the FEC-encoded data into a plurality of sub-channels; modulating the data from each of the plurality of sub-channels into a corresponding one of a plurality of sub-bands, the plurality of sub-bands having spaced apart center frequencies; and concurrently transmitting the data from the plurality of sub-bands onto a banded communication channel, the banded communication channel comprising one or more pass-bands and one or more stop-bands.

Abstract: A communication method is provided for a communication system comprising a transmitter and a receiver. The method involves communicating data from the transmitter to the receiver over a banded communication channel The method comprises: applying a forward error correction, FEC, code to data to be transmitted to obtain FEC-encoded data; assigning the FEC-encoded data into a plurality of sub-channels; modulating the data from each of the plurality of sub-channels into a corresponding one of a plurality of sub-bands, the plurality of sub-bands having spaced apart center frequencies; and concurrently transmitting the data from the plurality of sub-bands onto a banded communication channel, the banded communication channel comprising one or more pass-bands and one or more stop-bands.

Abstract: Embodiments of the present invention provide apparatuses and methods for that provide for a central command and control center that controls, monitors, and analyzes the systems and components of various remote facilities. Generally, the system comprises a control panel installed at each of a plurality of remote facilities. The control panel is connected through a wide area network to the command and control center. The control panel is also connected through a local area network to the facility's lighting systems, single point devices, HVAC systems, and/or other power-using systems and devices for monitoring these systems. The single point devices may include but are not limited to people counters, outside air temperature sensors, space/CO2 humidity sensors, space temperature sensors, branch power meters, and, in some cases, motion detectors and outside photocells.

Abstract: A method to look at the incoming received data on a SerDes link while running in normal operation without requiring a second receive path or any defined or repeated data patterns to be able to generate statistical eye plots both before and after any internal equalization; generate trajectory eye plots both before and after any internal equalization; estimate TED characteristics (hence also estimate SJ jitter tolerance of the link); estimate complete Channel Impulse Response (hence also estimate the S-parameters of the complete channel); and estimate the decomposed jitter of the complete channel.

Abstract: Embodiments of the present invention provide apparatuses and methods for intelligently monitoring and managing, from a centralized location, one or more power-using systems. For example, in one embodiment of the invention, a current sensor is installed at each heating or cooling system at a facility to measure the electricity used by each heating or cooling system. A current sensor is also installed at each facility to measure the total amount of electricity used by the facility. The current measurements are monitored in real time or near real time to monitor operation of the heating and cooling systems at the facility. In some embodiments, temperature sensors and other sensors are installed for each heating and cooling system and are also used to monitor operation of the heating and cooling systems. In some embodiments, controllers are also installed for each heating and cooling system to permit control of each system at a remote central control system.

Abstract: Embodiments of the invention relate to apparatuses and methods for gathering and analyzing facility weather data, such as temperature and humidity data, and energy-usage data, such as electricity-usage data, from a plurality of remote facilities and using the analysis to assess energy-using systems and/or methods across an organization made up of the plurality of remote facilities.

Abstract: Embodiments of the invention relate to apparatuses and methods for gathering and analyzing facility weather data, such as temperature and humidity data, and energy-usage data, such as electricity-usage data, from a plurality of remote facilities and using the analysis to assess energy-using systems and/or methods across an organization made up of the plurality of remote facilities.

Abstract: Embodiments of the invention provide apparatuses and methods for providing a user interface, including a graphical user interface, that allows a user to monitor and manage, from a centralized location, the heating systems, cooling systems, and/or other electrical systems of a plurality or remote facilities.

Abstract: Embodiments of the present invention provide apparatuses and methods for that provide for a central command and control center that controls, monitors, and analyzes the systems and components of various remote facilities. Generally, the system comprises a control panel installed at each of a plurality of remote facilities. The control panel is connected through a wide area network to the command and control center. The control panel is also connected through a local area network to the facility's lighting systems, single point devices, HVAC systems, and/or other power-using systems and devices for monitoring these systems. The single point devices may include but are not limited to people counters, outside air temperature sensors, space/CO2 humidity sensors, space temperature sensors, branch power meters, and, in some cases, motion detectors and outside photocells.

Abstract: Embodiments of the present invention provide apparatuses and methods for intelligently monitoring and managing, from a centralized location, one or more power-using systems. For example, in one embodiment of the invention, a current sensor is installed at each heating or cooling system at a facility to measure the electricity used by each heating or cooling system. A current sensor is also installed at each facility to measure the total amount of electricity used by the facility. The current measurements are monitored in real time or near real time to monitor operation of the heating and cooling systems at the facility. In some embodiments, temperature sensors and other sensors are installed for each heating and cooling system and are also used to monitor operation of the heating and cooling systems. In some embodiments, controllers are also installed for each heating and cooling system to permit control of each system at a remote central control system.

Abstract: A clock signal generator responsive to a frequency control word and a reference clock signal having a reference clock frequency fref. The clock signal generator generates an output clock signal having a frequency fgen, wherein fgen is less than fref. A modulo-N counter accepts the reference clock signal as input. The modulo-N counter generates a phase-indication signal of the reference clock. The phase indication signal has N clock phases repeating at a frequency of fref/N. An accumulator iteratively accumulates a frequency control word into a modulo-N adder and produces an accumulated value. One or more bits of the accumulated value is fed-back into the modulo-N adder for adding modulo N to the accumulated value in the next iteration. N of the modulo-N adder is the same integer as in the modulo-N counter.

Abstract: A thermal energy storage apparatus capable of storing large quantities of heat uses a plurality of energy storage zones having essentially the same thermal energy storage capacity per zone. The flow of a fluid into each zone is separately and independently controlled thereby creating a modular system that is capable of responding to rapid changes in the supply of and/or demand for thermal energy.